Function callback

packager/src/ModuleGraph/__tests__/Graph-test.js:107–115

()

    let calls = 0;
    function callback() {
      if (calls === 0) {
        process.nextTick(() => {
          expect(calls).toEqual(1);
          done();
        });
      }
      ++calls;
    }

    graph(['entryA', 'entryB'], anyPlatform, noOpts, callback);
  });